Final decision: No.
Alright, so there are a lot of issues being brought up in relation to physics - so let's put this question out here.
Who thinks that we should entirely scrap the goal of "staying fairly close to NeoLemmix 1 physics", and instead reconsider every point while making NX2's physics - that's not to say that nothing will be exactly the same, but simply that each detail will be discussed and simply "Keep it as it is" will not be an overriding factor if good reasons are given to change something.
Yes, this will potentially break a lot of levels. But, some of the changes already being asked for already pose some risk of this.
(This might also be a good time to reconsider the possibility of a complete switch to hi-res; if we're going to be rebooting physics anyway, then doing this is much more logical than if we were trying to stay close to the original ones.)
If the answer is no, then this will also be taken as a sign that any changes should be kept to a minimum; because if we're going to be breaking stuff anyway, we may as well break everything at once rather than re-break it again and again later (and thus force constant updates, or levels that are no longer compatible with the newest versions). Do keep in mind that those who for whatever reason really want NX1's physics, could always continue to use NX1 - it will no longer be updated, sure, but I don't plan to make it vanish off the face of the earth if there are people who still want to use it.
Also, I'll make this very clear - if such a reboot occurs, there will be no OPTIONS - an argument can be made to have them with current physics. Such an argument cannot, in my opinion, be made when the entire physics set is being reconsidered more or less from scratch (obviously, using current ones as a starting point, but without the insistance on sticking to them as closely as possible).